FIRST IN FIRST OUT CIRCUIT

摘要

A FIFO circuit for data access is provided which absorbs the clock difference between to two hierarchies and easily monitors the state of memory. The FIFO circuit includes a memory 1 for storing data, a write controller 2 for controlling writing into the memory 1, a read controller 4 for controlling reading from the memory 1, and a flag state manager 3 for maintaining the flag state of the memory 1, thereby easily connecting the two hierarchies.